Nanocrystals of a new complex perovskite dielectric Ba2TmSbO6

Abstract Nanocrystals of a new complex perovskites ceramic oxide, barium thulium antimony oxide – Ba 2 TmSbO 6 , were synthesized using a single step auto-ignition combustion process. The combustion product was single phase and composed of aggregates of nanocrystals of sizes in the range 20–50 nm. Ba 2 TmSbO 6 crystallized in cubic perovskite structure with lattice parameter, a = 8.4101 A. The polycrystalline fluffy combustion product was sintered to high density (∼97%) at ∼1450 °C for 4 h. Resistivity of the sintered specimen was ∼5 MΩ/cm. The Ba 2 TmSbO 6 has dielectric constant ( ɛ ′) and dielectric loss (tan δ ) of 17 and ∼10 −4 at 5 MHz; the new material would probably be developed as a low-loss dielectric material.